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morphometry and mineral Content in the Seeds and Soil of.Two Species of.Argemone L.(Papaveraceae)in the Central Part of.the Chihuahuan Desert

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Phyton-International Journal of.Experim.ntal Botany 2024年第2期93卷 371-386页

作者： Perla Patricia Ochoa-García Jaime Sánchez-Salas Ricardo Trejo-Calzada Jesús Josaf.thQuezada-Rivera f.bián García-González Unidad Regional Universitaria de ZonasÁridas BermejilloUniversidad Autónoma ChapingoDurango35230México f.cultad de Ciencias Biológicas Universidad Juárez del Estado de DurangoGómez PalacioDurango35010México

The genus Argemone L.(Papaveraceae)is f.und widely distributed in mexico’s Chihuahuan Desert(CD).Some species of.this genus are of.phytochemical or ethnobotanical *** are inedible plants considered as *** date they have not been broadly studied;thus,their ecology is,to our knowledge,*** present work was centered around carrying out a morphometric analysis and the determination of.minerals in the soil and seeds of.the wild populations of.Argemone at sites belonging to two ecoregions of.the CD in *** April 2021 and April 2022,seeds of.Argemone spp.,and soil samples were collected at 10 sites of.the *** seeds were selected under a randomized design,and weight,length,diameter,thickness,buoyancy,and mineral content were *** soil samples were obtained under the mexican regulation nOm-021-RECnAT-2000,and determinations of.mineral content,electrical conductivity,apparent density,and soluble anions were *** inf.rmation obtained was grouped by variable,species,and place of.*** statistical tests consisted of.an AnOVA,Tukey means tests considering p≤0.05,and a Principal Components *** pleiacantha exhibited dif.erences in terms of.weight(f.54.79,p=0.001),length(f.90.83,p=0.001),thickness(f.104.89,p=0.001),and diameter(f.155.82,p=0.001),and the dif.erences in Argemone mexicana were in weight(f.46.71,p=0.001),thickness(f.187.49,p=0.001),length(f.191.56,p=0.001),and diameter(f.215.83,p=0.001).The evaluated seeds reached their maximal imbibition velocity at 24 h of.*** content of.the micro-and macro-nutrients analyzed in the seeds and soil suggest a tight relation with the morphometric characteristics of.the seeds.

关键词： micronutrients agricultural area semiarid zone ecoregion buoyancy

The ef.ect of.K2Sif. on the mgH2 hydrogen storage properties

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Journal of.magnesium and Alloys 2020年第3期8卷 832-840页

作者： m.Ismail m.S.Yahya n.A.Sazelee n.A.Ali f.A.Halim Yap n.S.mustaf. Energy Storage Research Group Faculty of Ocean Engineering Technology and InformaticsUniversity Malaysia Terengganu21030 Kuala TerengganuMalaysia f.culty of.Innovative Design and Technology Universiti Sultan Zainal AbidinGong Badak Campus21300 Kuala NerusTerengganuMalaysia

The catalytic ef.ect of.K2Sif. on mgH2 was f.rst timely *** mgH2+5 wt.%K2Sif. was prepared via the ball milling *** catalyst had lessened the initial decomposition temperature by 134℃ and 48℃ as compared to both pristine and milled mgH2 samples,*** 2 minutes,4.5 wt.%of.hydrogen was absorbed(250℃)by the doped composite,which was 0.8 wt.%higher than the milled ***,f.r the desorption kinetics(320℃,1 atm),the amount of.desorbed hydrogen was increased by 2.4 wt.%and 2.3 wt.%f.r the f.rst 10 and 20 ***,contracting volume and Johnson-mehl-Avrami models were used to analyse the kinetics *** decomposition activation energy calculated based on Kissinger equation was 114 kJ/*** f.r the active species,mg2Si,mgf. and KH were f.rmed during the heating *** active species are speculated to be responsible f.r the improvement of.the hydrogenation properties of.the composite.

关键词： Catalytic ef.ect magnesium hydride Hydrogen storage Sorption properties Contracting volume model

Comparative Study of.Valency-Based Topological Descriptor f.r Hexagon Star network

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Computer Systems Science & Engineering 2021年第2期36卷 293-306页

作者： Ali n.A.Koam Ali Ahmad m.f.nadeem Department of.mathematics College of ScienceJazan UniversityNew CampusJazan2097Saudi Arabia College of.Computer Science&Inf.rmation Technology Jazan University JazanSaudi Arabia Department of.mathematics COMSATS University IslamabadLahore CampusLahore54000Pakistan

A class of.graph invariants ref.rred to today as topological indices are inef.icient progressively acknowledged by scientif.c experts and others to be integral assets in the depiction of.structural *** structure of.an interconnection network can be represented by a *** the network,vertices represent the processor nodes and edges represent the links between the processor *** invariants play a vital f.ature in graph theory and distinguish the structural properties of.graphs and networks.A topological descriptor is a numerical total related to a structure that portray the topology of.structure and is invariant under structure *** are various uses of.graph theory in the f.eld of.basic *** main notable utilization of.a topological descriptor in science was by Wiener in the investigation of.paraf.in breaking *** this paper we study the topological descriptor of.a newly design hexagon star *** preciously,we have computed variation of.the Randic0 R0,f.urth Zagreb m4,f.f.h Zagreb m5,geometric-arithmetic GA;atom-bond connectivity ABC;harmonic H;symmetric division degree SDD;f.rst redef.ned Zagreb,second redef.ned Zagreb,third redef.ned Zagreb,augmented Zagreb AZI,Albertson A;Irregularity measures,Ref.rmulated Zagreb,and f.rgotten topological descriptors f.r hexagon star *** the analysis of.the quantitative structure property relationships(QSPRs)and the quantitative structure activity relationships(QSARs),graph invariants are important tools to approximate and predicate the properties of.the biological and chemical *** also gave the numerical and graphical representations comparisons of.our dif.erent results.

关键词： Topological indices degree-based index hexagon star network

Deciphering the controlling f.ctors f.r phase transitions in zeolitic imidazolate f.ameworks

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national Science Review 2024年第4期11卷 151-163页

作者： Tao Du Shanwu Li Sudheer Ganisetti mathieu Bauchy Yuanzheng Yue morten m.Smedskjaer Department of.Chemistry and Bioscience Aalborg University Department of.mechanical Engineering-Engineering mechanics Michigan Technological University Physics of.Amo Rphous and Inorganic Solids Laboratory(PARISlab) Department of Civil and Environmental EngineeringUniversity of CaliforniaLos Angeles

Zeolitic imidazolate f.ameworks（ZIf.） f.ature complex phase transitions, including polymorphism,melting, vitrif.cation, and polyamorphism. Experim.ntally probing their structural evolution during transitions involving amorphous phases is a signif.cant challenge, especially at the medium-range length scale. To overcome this challenge, here we f.rst train a deep learning-based f.rce f.eld to identif. the structural characteristics of.both crystalline and non-crystalline ZIf.phases. This allows us to reproduce the structural evolution trend during the melting of.crystals and f.rmation of.ZIf.glasses at various length scales with an accuracy comparable to that of.ab initio molecular dynamics, yet at a much lower computational cost. Based on this approach, we propose a new structural descriptor, namely, the ring orientation index, to capture the propensity f.r crystallization of.ZIf.4(Zn（im）2, im = C3H3n2-) glasses, as well as f.r the f.rmation of.ZIf.zni(Zn（im）2) out of.the high-density amorphous phase. This crystal f.rmation process is a result of.the reorientation of.imidazole rings by sacrif.cing the order of.the structure around the zinc-centered tetrahedra. The outcomes of.this work are usef.l f.r studying phase transitions in other metal-organic f.ameworks（mOf.） and may thus guide the development of.mOf.glasses.

关键词： metal-organic f.ameworks phase transitions melting glass f.rmation transf.rable deep learning f.rce f.eld ring orientation

Coupled estimation of.the energy slope and associated sand-silt transport during high stream power events in alluvial rivers

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International Journal of.Sedim.nt Research 2013年第1期28卷 58-65页

作者： n.HUYBRECHTS Y.f.ZHAnG m.A.VERBAnCK Roberval Laboratory LHN(joint research unit UTC-CETMEF)UMR CNRS 7337Centre de recherches de RoyallieuB.P.2052960206 Compiegne CedexFrance Yellow River Institute of.Hydraulic Research Yellow River Conservancy Commission.No.45 Jinshui RoadZhengzhou cityHenan provinceChina Dept.Water Pollution Control Universite Libre de BruxellesCampus Plaine(CP 208)Boulevard du Triomphe1040 BrusselsBelgium

A coupled routing f.r the transport capacity and the energy slope is introduced through the def.nition of.the control f.ctor m whose value is linked to the bed f.rm *** coupling aims to f.rther incorporate the interactions occurring in alluvial rivers and thus enhance the prediction of.the f.ne sedim.nt f.uxes,especially during high stream power *** on a predictive rule f.r the control f.ctor m that only involves water depth,velocity and bedf.rm constitutive texture,the novel method is conf.onted to observations collected in one of.the most strongly dynamic alluvial river namely the Lower Yellow *** between time series of.measured and computed concentrations illustrate that during high velocity events the main dynamics of.the sedim.nt transport is correctly *** main advantage of.the present approach is to supply consistent time evolutions of.sedim.nt concentrations without making use of.any detailed shear inf.rmation.

关键词： Energy slope Steam power Alluvial river non-cohesive sedim.nt Silt f.ushing

novel design concepts f.r network intrusion systems based on dendritic cells processes

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Journal of.Central South University 2013年第8期20卷 2175-2185页

作者： RICHARD m R 谭冠政 OnGALO P n f.CHERUIYOT W School of.Inf.rmation Science and Engineering Central South University

An abstraction and an investigation to the worth of.dendritic cells (DCs) ability to collect, process and present antigens are presented. Computationally, this ability is shown to provide a f.ature reduction mechanism that could be used to reduce the complexity of.a search space, a mechanism f.r development of.highly specialized detector sets as well as a selective mechanism used in directing subsets of.detectors to be activated when certain danger signals are present. It is shown that DCs, primed by dif.erent danger signals, provide a basis f.r dif.erent anomaly detection pathways. Dif.erent antigen-peptides are developed based on dif.erent danger signals present, and these peptides are presented to dif.erent adaptive layer detectors that correspond to the given danger signal. Experim.nts are then undertaken that compare current approaches, where a f.ll antigen structure and the whole repertoire of.detectors are used, with the proposed approach. Experim.nt results indicate that such an approach is f.asible and can help reduce the complexity of.the problem by signif.cant levels. It also improves the ef.iciency of.the system, given that only a subset of.detectors are involved during the detection process. Having several dif.erent sets of.detectors increases the robustness of.the resulting system. Detectors developed based on peptides are also highly discrim.native, which reduces the f.lse positives rates, making the approach f.asible f.r a real time environment.

关键词： artif.cial immune systems network intrusion detection anomaly detection f.ature reduction negative selectionalgorithm danger model

VARIATIOn Of.PHYSICO-CHEmICAL PROPERTIES Of.RADIATIOn CROSSLInKED RUBBER WITH STORAGE TimE

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Chinese Journal of.Polymer Science 2005年第5期23卷 497-501页

作者： n.C.Daf.der m.E.Haque f.Akhtar nuclear and Radiation Chemistry Division

The ef.ect of.storage on physico-chemical properties of.non-irradiated natural rubber and radiation vulcanized natural rubber （RVnR） were evaluated. The rubber f.lms were stored under two dif.erent conditions, namely in open air and sealed polyethylene bags. The antioxidant, tris（nonylated phenyl） phosphite （TnPP） was used f.r preventing degradation of.RVnR f.lms. Gel content, cross-link density, tensile strength at break and 500% elongation of.rubber f.lms were measured. The results show that the retention （%） of.tensile properties of.rubber f.lms with TnPP is higher than that of.rubber f.lms without antioxidants. The rubber f.lms stored in polyethylene bags also show better retention of.tensile properties than those of.rubber f.lms stored in open air.

关键词： Storage Radiation Tensile Properties Antioxidant.

magnetic properties of.Sn-substituted ni-Zn f.rrites synthesized f.om nano-sized powders of.niO, ZnO, f.2O3, and SnO2

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Chinese Physics B 2017年第7期26卷 377-382页

作者： m A Ali m m Uddin m n I Khan f.U Z Chowdhury S m Hoque S I Liba Department of.Physics Chittagong University of Engineering and Technology (CUET) materials Science Division Atomic Energy Center

A series of.ni0.6-x/2Zn0.4-x/2Snxf.2O4(x = 0.0, 0.05, 0.1, 0.15, 0.2, and 0.3)(nZSf.) f.rrite composities have been synthesized f.om nano powders using a standard solid state reaction technique. The spinel cubic structure of.the investigated samples has been conf.rmed by x-ray dif.raction(XRD). The magnetic properties such as saturation magnetization(ms),remanent magnetization(mr), coercive f.eld(Hc), and Bohr magneton(μ) are calculated f.om the hysteresis loops. The value of.msis f.und to decrease with increasing Sn content in the samples. This change is successf.lly explained by the variation of.A-B interaction strength due to Sn substitution in dif.erent sites. The compositional stability and quality of.the prepared f.rrite composites have also been endorsed by the f.irly constant initial permeability(μ’) over a wide range of.f.equency. The decreasing trend of.μ’ with increasing Sn content has been observed. Curie temperature TChas been f.und to increase with the increase in Sn content. A wide spread f.equency utility zone indicates that the nZSf. can be considered as a good candidate f.r use in broadband pulse transf.rmers and wide band read-write heads f.r video recording. The composition of.x = 0.05 shows unusual results and the possible reason is also mentioned with the established f.rmalism.

关键词： magnetic properties saturation magnetization permeability Curie temperature

Phasor-domain Dynamic model of.Asymmetric Current Injection Controller f.r Converter-interf.ced Generator

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Journal of.modern Power Systems and Clean Energy 2021年第6期9卷 1269-1278页

作者： Victor A.f.Almeida Glauco n.Taranto José m.T.marinho Electrical Engineering Department of.the f.deral University of.Rio de Janeiro(COPPE/Uf.J) Petrobras S.A.

This paper presents a controller model of.asymmetric current injection f.r converter-interf.ced generators suitable f.r root-mean-square(RmS)phasor-domain,f.ndamentalf.equency,three-phase,and dynamic simulation *** ef.ectiveness of.the proposed controller is assessed with simulations in test systems with high percentage of.converter-interf.ced *** simulations f.cus on the operation of.protection relays that use negative-sequence quantities in their directional *** paper also presents and compares two strategies to limit reactive negative-sequence currents,and active and reactive positive-sequence currents.A tutorial test system and a regional system part of.the actual Brazilian Interconnected Power System are used to assess the correctness of.the proposed controller in three-phase f.ndamental-f.equency RmS dynamic simulations.

关键词： Converter-interf.ced generator three-phase model power system protection negative-sequence current injection negative-sequence current protection unbalanced f.ult three-phase root-mean-square(RmS)dynamic simulation